Vercel Cache Reason：MISS・BYPASS・STALEを別の運用課題として読む
Tech
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statusは何が起きたか、reasonはなぜ起きたかを示します。遅延、origin負荷、鮮度を理由別に測定します。
| Status | Reason | Action |
|---|---|---|
| MISS | Cold | Check prerender and lifetime |
| BYPASS | Crawler / Draft Mode | Confirm intentional bypass |
| STALE | Revalidation error | Investigate origin while stale serves |
Operational checklist
✓Group metrics by cache_reason
✓Separate latency, origin load, and freshness
✓Do not optimize intentional bypass as a miss